No. Those returns are being audited by the IRS. For us ordinary taxpayers, there is nothing worse than getting audited. I dare say it causes Trump less pain and he has tax lawyers to handle it. But still. And I think they have audited him every year now. The IRS, whose bureaucrats are all Democrats, who would love to get something, anything, on Trump. If there is anything bad, flaky, or off color in Trump's 2016 tax return, the IRS will let us know. Never fear.
The newsies would love to get a hold of those returns. There is always plenty of stuff that can be made to look bad, with just a gentle slanting. Not enough charitable donations, donations to politically incorrect causes, capital losses, too much alimony or not enough alimony. Lots of stuff.
And talking and demonstrating against Trump's tax returns diverts public attention from serious stuff, like Obamacare reform, tax reform, international trade, real stuff, not fake news.